#include<stdio.h>    
#include<stdlib.h>    
void func(int* a,int* b)    
{    
  int c = *a;    
  *a = *b;    
  *b = c;    
}    
int* fun2(int n)    
{    
  int *a = (int *)malloc(sizeof(n)*n);    
  return a;                                                                       
}    
int main()    
{    
  return 0;    
}  
